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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
/***
Copyright © 2013 Intel Corporation. All rights reserved.
***/
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <stdint.h>
#include "sd-dhcp-protocol.h"
#include "macro.h"
#include "sparse-endian.h"
#include "time-util.h"
/* RFC 8925 - IPv6-Only Preferred Option for DHCPv4 3.4.
* MIN_V6ONLY_WAIT: The lower boundary for V6ONLY_WAIT. Value: 300 seconds */
#define MIN_V6ONLY_WAIT_USEC (300U * USEC_PER_SEC)
struct DHCPMessage {
uint8_t op;
uint8_t htype;
uint8_t hlen;
uint8_t hops;
be32_t xid;
be16_t secs;
be16_t flags;
be32_t ciaddr;
be32_t yiaddr;
be32_t siaddr;
be32_t giaddr;
uint8_t chaddr[16];
uint8_t sname[64];
uint8_t file[128];
be32_t magic;
uint8_t options[];
} _packed_;
typedef struct DHCPMessage DHCPMessage;
struct DHCPPacket {
struct iphdr ip;
struct udphdr udp;
DHCPMessage dhcp;
} _packed_;
typedef struct DHCPPacket DHCPPacket;
#define DHCP_IP_SIZE (int32_t)(sizeof(struct iphdr))
#define DHCP_IP_UDP_SIZE (int32_t)(sizeof(struct udphdr) + DHCP_IP_SIZE)
#define DHCP_HEADER_SIZE (int32_t)(sizeof(DHCPMessage))
#define DHCP_MIN_MESSAGE_SIZE 576 /* the minimum internet hosts must be able to receive, see RFC 2132 Section 9.10 */
#define DHCP_MIN_OPTIONS_SIZE (DHCP_MIN_MESSAGE_SIZE - DHCP_HEADER_SIZE)
#define DHCP_MIN_PACKET_SIZE (DHCP_MIN_MESSAGE_SIZE + DHCP_IP_UDP_SIZE)
#define DHCP_MAGIC_COOKIE (uint32_t)(0x63825363)
enum {
DHCP_PORT_SERVER = 67,
DHCP_PORT_CLIENT = 68,
};
enum {
BOOTREQUEST = 1,
BOOTREPLY = 2,
};
enum {
DHCP_DISCOVER = 1, /* [RFC2132] */
DHCP_OFFER = 2, /* [RFC2132] */
DHCP_REQUEST = 3, /* [RFC2132] */
DHCP_DECLINE = 4, /* [RFC2132] */
DHCP_ACK = 5, /* [RFC2132] */
DHCP_NAK = 6, /* [RFC2132] */
DHCP_RELEASE = 7, /* [RFC2132] */
DHCP_INFORM = 8, /* [RFC2132] */
DHCP_FORCERENEW = 9, /* [RFC3203] */
DHCPLEASEQUERY = 10, /* [RFC4388] */
DHCPLEASEUNASSIGNED = 11, /* [RFC4388] */
DHCPLEASEUNKNOWN = 12, /* [RFC4388] */
DHCPLEASEACTIVE = 13, /* [RFC4388] */
DHCPBULKLEASEQUERY = 14, /* [RFC6926] */
DHCPLEASEQUERYDONE = 15, /* [RFC6926] */
DHCPACTIVELEASEQUERY = 16, /* [RFC7724] */
DHCPLEASEQUERYSTATUS = 17, /* [RFC7724] */
DHCPTLS = 18, /* [RFC7724] */
};
enum {
DHCP_OVERLOAD_FILE = 1,
DHCP_OVERLOAD_SNAME = 2,
};
#define DHCP_MAX_FQDN_LENGTH 255
enum {
DHCP_FQDN_FLAG_S = (1 << 0),
DHCP_FQDN_FLAG_O = (1 << 1),
DHCP_FQDN_FLAG_E = (1 << 2),
DHCP_FQDN_FLAG_N = (1 << 3),
};
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